Arriving at Halfway Through the Grand Line! The Red Line

After traversing the treacherous Serpent Currents, the Straw Hats finally arrive at the Red Line, signifying that they've sailed halfway around the world and that their voyage is half over. While the crew reflects and takes a well-deserved rest, a sea monster attacks. Luffy easily dispatches it, forcing it to spit up a talking starfish and a genuine Mermaid onto the Sunny's deck.